Blekko's alternative search engine -- a $24 million venture-backed project that's been three years in the making -- is today launching its public beta. With the official rollout, Blekko is also releasing several new features designed for both mainstream and the site's super users. The most significant upgrade to Blekko's search engine is the addition of slashtags that auto-fire for queries that fall into one seven categories: health, colleges, autos, personal finance, lyrics, recipes and hotels. See the full article:http://edition.cnn.com/2010/TECH/web/11/01/blekko.search.launch.mashable/index.html?iref=NS1